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Instability to a heterogeneous oscillatory state in randomly connected recurrent networks with delayed interactions

机译:在随机连接的经常性网络中对具有延迟相互作用的复发网络中的异构振荡状态的不稳定性

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摘要

Oscillatory dynamics are ubiquitous in biological networks. Possible sources of oscillations are well understood in low-dimensional systems but have not been fully explored in high-dimensional networks. Here we study large networks consisting of randomly coupled rate units. We identify a type of bifurcation inwhich a continuous part of the eigenvalue spectrum of the linear stabilitymatrix crosses the instability line at nonzero frequency. This bifurcation occurs when the interactions are delayed and partially antisymmetric and leads to a heterogeneous oscillatory state in which oscillations are apparent in the activity of individual units but not on the population-average level.
机译:振荡动力学在生物网络中普遍存在。 在低维系统中可能理解可能的振荡源,但在高维网中尚未完全探索。 在这里,我们研究了由随机耦合速率单元组成的大型网络。 我们识别出一种分叉类型的分叉,其线性稳定性的特征值谱的连续部分通过非零频率的不稳定性线。 当相互作用延迟并且部分反对二手时发生这种分叉并导致异构振荡状态,其中在各个单位的活动中振荡是显而易见的,但不是人口平均水平。

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